Norton Commando
Jerrydoe.com  Forum Home  Norton Commando Forum  Photos  [FAQ]  [Search]  [Memberlist]   
 [Profile]  [Check your private messages]  [Register]  [Log in] 
Help with engine disassembly

 
Post new topic   Reply to topic    Norton Commando Forum Index -> Norton Commando Motorcycles.
View previous topic :: View next topic  
Author Message
ExFlier



Joined: 06 Feb 2005
Posts: 3
Location: Seattle

PostPosted: Sun Feb 06, 2005 7:40 pm    Post subject: Help with engine disassembly Reply with quote

I recently purchased a '71 Commando 750 and am just getting started on a total rebuild. I am running into a problem in removing the head from the cylinder, specifically in removing the nut from the upside-down stud at the rear of the cylinder. It appears to be a 1/4" Whitworth size, and to date I have scrounged up a spare 1/4" open-ended wrench and ground down the thickness of the head so that it will fit in between the fins on the cylinder. However, despite my tool modification I'm having great difficulty in actually getting the spanner to slide onto the nut. Any suggestions from anyone? Is it truly a 1/4" Whitworth fastener, or has my effort so far been for naught? I'd hate to do more serious grinding on the spanner to attempt to get it to fit if in fact the nut isn't even 1/4".

Any help from anyone?


Jeff
Back to top
fastback



Joined: 18 Jul 2004
Posts: 245
Location: Toronto, Canada

PostPosted: Sun Feb 06, 2005 10:44 pm    Post subject: Reply with quote

ExFlier,

I used the ring end (12 flats) of a cheap 13mm combo wrench - it fit perfectly after having the outside of the ring ground down to fit.

Funny enough the open end of the wrench does not fit ~ the nut fit perfectly in my 1/4ww socket when removed.

Phil
Back to top
Ron L



Joined: 27 Feb 2004
Posts: 1151
Location: Ohio

PostPosted: Mon Feb 07, 2005 4:47 am    Post subject: Reply with quote

I have a couple of 1/4 whitworth ring spanners which work well here. One I got from Domiracer years ago and looks like the old "starter/generator" box end. That is, it is shaped like a broad "C". The rings have thin walls necessary to fit this nut. The angled handle allows you to turn the wrench with some decent leverage. I'm sure Tony and Jonathon still have some and most Norton parts suppliers do too.

The other one I have is an old Triumph wrench that is a short, thin walled ring spanner that works well and will swing between the barrel and the air filter, but has very little leverage for breaking loose a tight nut. I don't know where I picked this one up.

I would avoid an open end wrench here as you can easily round off the flats and the proximity of the stud to the barrel means you can only get a few degrees of rotation before the wrench hits something.
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Norton Commando Forum Index -> Norton Commando Motorcycles. All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

The Unapproachable Norton Commando

At the end of 1967 the Norton Commando was announced.

The Norton Commando was greeted with a certain amount of scepticism because on first sight the commando appeared to comprise of the old Norton Dominator twin cylinder engine mounted at an inclined angle in a set of new cylinder parts.

It was not realized that the new Norton Commando Isolastic method of engine suspension damped out all engine vibration and produced a machine which had uncanny smoothness for a vertical twin. In due course the critics were silenced and the Norton Commando had the distinction of being regarded as the first of todays so called superbikes. There can be little doubt that the original design concept of the Norton Commando has proved correct, since comparatively few modifications of any real consequence have been made since production commenced during 1968.

Now nearly 40 years later Norton Commando riders like us are a breed of our own, and as far as we are concerned its still more fun to go for a blat on the old Norton Commando, and fast. As a Norton Commando owner and enthusiast, my goal here is to promote and give credit to those who keep the Norton name going.

It is more deserving to give credit to the Commando itself, for after all these years it continues to be respected. The original Commando designers like John Favill are those who deserve the credit for developing this incredible motorcycle.

The Norton Commando Roadster and Interstate of the late seventies, never died. Although the Norton Villiers factory dispersed the tradition lived on. Today Kenny Dreer in the USA is developing the new 952 CC Norton. What a great looking bike this is, and its engineering is still based on the original layout. It will be interesting to see how the new 952CC Norton does in todays tough motorcycle market. One thing is for sure, I would own one if I could afford it.